539730021 has 8 divisors (see below), whose sum is σ = 724406464. Its totient is φ = 357436800.

The previous prime is 539730011. The next prime is 539730031. The reversal of 539730021 is 120037935.

It is an interprime number because it is at equal distance from previous prime (539730011) and next prime (539730031).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 539730021 - 2¹³ = 539721829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (539730011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 595276 + ... + 596181.

It is an arithmetic number, because the mean of its divisors is an integer number (90550808).

Almost surely, 2^539730021 is an apocalyptic number.

It is an amenable number.

539730021 is a deficient number, since it is larger than the sum of its proper divisors (184676443).

539730021 is a wasteful number, since it uses less digits than its factorization.

539730021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191611.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 539730021 is about 23232.0903278203. The cubic root of 539730021 is about 814.1895520308.

Adding to 539730021 its reverse (120037935), we get a palindrome (659767956).

The spelling of 539730021 in words is "five hundred thirty-nine million, seven hundred thirty thousand, twenty-one".